Research and Production on Medium and Heavy Plate of HQ590DB Ultra-Low Carbon Bainitic Steel

赵志平; 康永林; 丛津功; 张晓刚

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Research and Production on Medium and Heavy Plate of HQ590DB Ultra-Low Carbon Bainitic Steel

更新时间：2026-01-21

- Research and Production on Medium and Heavy Plate of HQ590DB Ultra-Low Carbon Bainitic Steel
- Special Steel Vol. 26, Issue 1, Pages: 52-54(2005)
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- Received：14 July 2005，
  
  Online First：24 May 2023，
  
  Published：24 May 2005
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赵志平, 康永林, 丛津功, et al. Research and Production on Medium and Heavy Plate of HQ590DB Ultra-Low Carbon Bainitic Steel[J]. Special Steel, 2005, 26(1): 52-54.
DOI：

赵志平, 康永林, 丛津功, et al. Research and Production on Medium and Heavy Plate of HQ590DB Ultra-Low Carbon Bainitic Steel[J]. Special Steel, 2005, 26(1): 52-54. DOI：

摘要

采用 18 0t转炉 RH LF(Ca处理 ) 连铸坯 (mm) :2 30 (30 0 )× 16 5 0× 6 0 0 0 4 30 0轧机控轧控冷工艺试制了HQ5 90DB超低碳贝氏体钢 (% ) :0 0 5C

1 5Mn

0 0 4Nb

0 0 2Ti

≤ 0 0 0 0 2B的 30～ 4 0mm中板。连铸坯的 [H

]

1 7× 10

-6

]

2 1× 10

-6

]

2 9× 10

-6

。终轧温度 80 0～ 85 0℃

控制终冷温度 5 90～ 6 30℃

获得铁素体+板条状贝氏体组织

钢板抗拉强度σ

6 5 0～ 6 90MPa

屈服强度σ

0.2

4 90～ 5 90MPa

延伸率δ

2 0 %

并具有良好的成形性能。

Abstract

The 30~40 mm medium plate of HQ590DB ultra-low carbon bainitic steel - 0.05C- 1.5Mn-0.04Nb- 0.02Ti-≤0.0002B has been pilot-produced by 180 t converter- RH - LF (Ca treated)- concasting slab:230(300)mmx1650mm×6000 mm-4300 mill controlled rolling and cooling process. [H

]

in concasting slab was 1.7×10-⁶

]

21 ×10~⁶ and[N

]

29×10-6.With controlled finishing rolling temperature between 800 and 850 ℃ and cooling temperature between 590 and 630 ℃

the structure of ferrite + lath bainite was obtained

the tensile strength σ

of plate was 650～690 MPa

yield strength σ

0.2

490~590 MPa

elongation δ

20%

and the plate has excellent formability.

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